oleo Olenus • oleocalcareous · · · Info · Definitions · Synonyms · Characters · · oleo · · Text Latin · · Script 4 · · Length 3 · · Syllables Definitions · · · (noun) a spread made chiefly from vegetable oils and used as a substitute for butter. Synonyms: margarine, margarin, oleomargarine, marge. · · Noun Definition 1 Synonyms · · · margarine · · Synonym 1 margarin · · Synonym 2 oleomargarine · · Synonym 3 marge · · Synonym 4 Characters · · e latin small letter e U+0065 l latin small letter l U+006C o latin small letter o U+006F